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dbUnit is a JUnit extension (also usable from Ant and Maven) targeted for database-driven projects that, among other things, puts your database into a known state between test runs. This is an excellent way to avoid the myriad of problems that can occur when one test case corrupts the database and causes subsequent tests to fail or exacerbate the damage.

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/*
 *
 * The DbUnit Database Testing Framework
 * Copyright (C)2002-2004, DbUnit.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
package org.dbunit.dataset;

/**
 * @author Manuel Laflamme
 * @since Apr 5, 2003
 * @version $Revision$
 */
public interface ITableIterator
{
    /**
     * Position this iterator to the next table. The iterator is initially
     * positioned before the first table; the first call to the method next
     * makes the first table the current table; the second call makes the
     * second table the current table, and so on.
     *
     * @return true if the new current table is valid;
     * false if there are no more table
     */
    public boolean next() throws DataSetException;

    /**
     * Returns the metadata of the current table.
     */
    public ITableMetaData getTableMetaData() throws DataSetException;

    /**
     * Returns the current table.
     */
    public ITable getTable() throws DataSetException;
}